help plz doesnt go inside while loop

so the code is pretty simple. it just loops and if statements. first i have a main. i took the headers and prototypes out to make it smaller.
In main all iam doing is asking user to enter command and call one funtion.
// main.c

Write a C program that should create a 10 element array of random integers (0 to 9). The program should total all of the numbers in the odd positions of the array and compare them with the total of the numbers in the even positions of the array and indicate ...

I have a 2d matrix with dimension (3, n) called A, I want to calculate the normalization and cross product of two arrays (b,z) (see the code please) for each column (for the first column, then the second one and so on).
the function that I created to find the ...